Detachable Multi-Ring Traction for Unobstructed Endoscopic Dissection
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Solution Overview
Problem
Existing endoscopic submucosal dissection (ESD) techniques face inefficiencies in mucosa incision and dissection due to limited visibility and increased risk of perforation, as the incised mucosa obstructs the endoscope's view and prolongs treatment time.
Innovation Solution
A detachable multi-ring traction device is inserted through an endoscope's forceps channel, fixed by clips to lesion and normal mucosa, utilizing toroidal rings with core curves and meridional disks to efficiently pull and resect mucosa, maintaining clear endoscope visibility during the procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-ring traction device is used to pull the mucosa during ESD, then the mucosa can be lifted for dissection, but the incised mucosa covers the visual field of the endoscope and obstructs treatment
Solution Approach 1:
The traction device is divided into multiple rings (typically three rings) connected in series. The first ring attaches to the lesion mucosa, the second ring provides spacing, and the third ring attaches to the normal mucosa. This segmentation allows the device to pull the mucosa taut while maintaining endoscope visibility by distributing the traction function across multiple components rather than a single obstructing element.
2Productivity
If the mucosa is pulled taut for efficient incision and dissection, then productivity improves, but the risk of perforation increases due to excessive tension
Solution Approach 1:
Each ring is designed with specific local characteristics: the first and third rings have clip attachment mechanisms for securing to mucosa, while the second ring serves as a spacer. The rings are made of flexible material that distributes tension locally across the attachment points rather than concentrating force at a single point, reducing perforation risk while maintaining sufficient tension for efficient dissection.
3Productivity
If a complex multi-component traction device is used to maintain visibility and improve incision efficiency, then productivity and safety improve, but device complexity increases
Solution Approach 1:
Multiple functional elements are merged into a single integrated device structure. The three rings are connected in series forming one continuous traction device that can be inserted through the endoscope's forceps channel as a single unit. This merging reduces the complexity of manipulating multiple separate components while maintaining the functional benefits of distributed traction and visibility.
Data Source
AI summary
A detachable multi-ring traction device is inserted into a body through a forceps channel of an endoscope. When a lesion mucosa in the body is resected through an operation performed outside the body, the detachable multi-ring traction device is configured to be fixed by a clip to the lesion mucosa and a normal mucosa in order to pull the lesion mucosa, the normal mucosa opposing the lesion mucosa. The detachable multi-ring traction device includes toroidal rings each including a core curve and a meridional disk, the rings being coupled to each other such that outer edges of two adjacent ones of the rings are in contact with each other and the rings are connected to each other in a diametrical direction of the core curves.